The Media Codec APIs provides functions for encodinging and decoding using media data.

Required Header

#include <media_codec.h>

Overview

MEDIA CODEC API allows : The API allows you to direct access to the media codec on device. It operates on "raw" data, so any file headers must be stripped off. media_packet is used for zero-copy.

Functions
int	mediacodec_create (mediacodec_h *mediacodec)
	Creates a mediacodec handle for decoding/encoding.
int	mediacodec_destroy (mediacodec_h mediacodec)
	Destroys the mediacodec handle and releases all its resources.
int	mediacodec_set_codec (mediacodec_h mediacodec, mediacodec_codec_type_e codec_type, int flags)
	Sets the codec type and decoder/encoder.
int	mediacodec_set_vdec_info (mediacodec_h mediacodec, int width, int height)
	Sets the default info for the video decoder.
int	mediacodec_set_venc_info (mediacodec_h mediacodec, int width, int height, int fps, int target_bits)
	Sets the default info for the video encoder.
int	mediacodec_set_adec_info (mediacodec_h mediacodec, int samplerate, int channel, int bit)
	Sets the default info for the audio decoder.
int	mediacodec_set_aenc_info (mediacodec_h mediacodec, int samplerate, int channel, int bit, int bitrate)
	Sets the default info for the audio encdoer.
int	mediacodec_prepare (mediacodec_h mediacodec)
	Prepares mediacodec for encoding/decoding.
int	mediacodec_unprepare (mediacodec_h mediacodec)
	Unprepares mediacodec for encoding/decoding.
int	mediacodec_process_input (mediacodec_h mediacodec, media_packet_h inbuf, uint64_t timeOutUs)
	Decodes/Encodes a packet. The function passed undecoded/unencoded packet to the input queue and decode/encode a frame sequentially.
int	mediacodec_get_output (mediacodec_h mediacodec, media_packet_h *outbuf, uint64_t timeOutUs)
	Gets the decoded or encoded packet from the output queue.
int	mediacodec_flush_buffers (mediacodec_h mediacodec)
	Flushes both input and output buffers.
int	mediacodec_set_input_buffer_used_cb (mediacodec_h mediacodec, mediacodec_input_buffer_used_cb callback, void *user_data)
	set empty buffer callback the media codec for process, asynchronously.
int	mediacodec_unset_input_buffer_used_cb (mediacodec_h mediacodec)
	unset input buffer used callback the media codec for process, asynchronously.
int	mediacodec_set_output_buffer_available_cb (mediacodec_h mediacodec, mediacodec_output_buffer_available_cb callback, void *user_data)
	set output buffer available callback the media codec for process, asynchronously.
int	mediacodec_unset_output_buffer_available_cb (mediacodec_h mediacodec)
	unset output buffer available callback the media codec for process, asynchronously.
int	mediacodec_set_error_cb (mediacodec_h mediacodec, mediacodec_error_cb callback, void *user_data)
	set error callback the media codec for process, asynchronously.
int	mediacodec_unset_error_cb (mediacodec_h mediacodec)
	unset error callback the media codec for process, asynchronously.
int	mediacodec_set_eos_cb (mediacodec_h mediacodec, mediacodec_eos_cb callback, void *user_data)
	set eos callback the media codec for process, asynchronously.
int	mediacodec_unset_eos_cb (mediacodec_h mediacodec)
	unset eos callback the media codec for process, asynchronously.
int	mediacodec_set_buffer_status_cb (mediacodec_h mediacodec, mediacodec_buffer_status_cb callback, void *user_data)
	Registers a callback function to be invoked when the mediacodec needs more data or has enough data.
int	mediacodec_unset_buffer_status_cb (mediacodec_h mediacodec)
	Unregisters the callback function.
int	mediacodec_foreach_supported_codec (mediacodec_h mediacodec, mediacodec_supported_codec_cb callback, void *user_data)
	Retrieves all supported codecs by invoking callback function once for each supported codecs.
int	mediacodec_get_supported_type (mediacodec_h mediacodec, mediacodec_codec_type_e codec_type, bool encoder, int *support_type)
	Verifies whether encoding can be performed with codec_type or not.
int	mediacodec_get_packet_pool (mediacodec_h mediacodec, media_packet_pool_h *pool)
	Gets the media packet pool allocated for recycling media packets.
Typedefs
typedef struct mediacodec_s *	mediacodec_h
	Media Codec type handle.
typedef void(*	mediacodec_input_buffer_used_cb )(media_packet_h pkt, void *user_data)
	Called when the input buffer(pkt) used up.
typedef void(*	mediacodec_output_buffer_available_cb )(media_packet_h pkt, void *user_data)
	Called when the output buffer is available.
typedef void(*	mediacodec_error_cb )(mediacodec_error_e error, void *user_data)
	Called when the error has occured.
typedef void(*	mediacodec_eos_cb )(void *user_data)
	Called when there is no data to decode/encode.
typedef void(*	mediacodec_buffer_status_cb )(mediacodec_status_e status, void *user_data)
	Called when the mediacodec needs more data or has enough data.
typedef bool(*	mediacodec_supported_codec_cb )(mediacodec_codec_type_e codec_type, void *user_data)
	Called once for each supported codec types.

Typedef Documentation

typedef void(* mediacodec_buffer_status_cb)(mediacodec_status_e status, void *user_data)

Called when the mediacodec needs more data or has enough data.

Since :: 3.0

It is recommended that the application stops calling mediacodec_process_input() when MEDIACODEC_ENOUGH_DATA is invoked.

Parameters:

[in] user_data The user data passed from the callback registration function

See also:: mediacodec_set_buffer_status_cb(); mediacodec_unset_buffer_status_cb()

typedef void(* mediacodec_eos_cb)(void *user_data)

Called when there is no data to decode/encode.

Since :: 2.3.1

It will be invoked when the end-of-stream is reached.

Parameters:

[in] user_data The user data passed from the callback registration function

Precondition:: It will be invoked when the eos event generate if you register this callback using mediacodec_set_eos_cb().

See also:: mediacodec_set_eos_cb(); mediacodec_unset_eos_cb()

typedef void(* mediacodec_error_cb)(mediacodec_error_e error, void *user_data)

Called when the error has occured.

Since :: 2.3.1

It will be invoked when the error has occured.

Parameters:

[in]	error_code	The error code
[in]	user_data	The user data passed from the callback registration function

Precondition:: It will be invoked when the error has occured if you register this callback using mediacodec_set_error_cb().

See also:: mediacodec_set_error_cb(); mediacodec_unset_error_cb()

typedef struct mediacodec_s* mediacodec_h

Media Codec type handle.

Since :: 2.3.1

typedef void(* mediacodec_input_buffer_used_cb)(media_packet_h pkt, void *user_data)

Called when the input buffer(pkt) used up.

Since :: 2.3.1

It will be invoked when mediacodec has used input buffer.

Parameters:

[in]	pkt	The media packet handle
[in]	user_data	The user data passed from the callback registration function

Precondition:: It will be invoked when input buffer process completed if you register this callback using mediacodec_set_input_buffer_used_cb().

See also:: mediacodec_set_input_buffer_used_cb(); mediacodec_unset_input_buffer_used_cb()

typedef void(* mediacodec_output_buffer_available_cb)(media_packet_h pkt, void *user_data)

Called when the output buffer is available.

Since :: 2.3.1

It will be invoked when mediacodec has output buffer.

Parameters:

[in]	pkt	The media packet handle
[in]	user_data	The user data passed from the callback registration function

Precondition:: It will be invoked when mediacodec process completed(had output buffer) if you register this callback using mediacodec_set_fill_buffer_cb().

See also:: mediacodec_set_output_buffer_available_cb(); mediacodec_unset_output_buffer_available_cb()

typedef bool(* mediacodec_supported_codec_cb)(mediacodec_codec_type_e codec_type, void *user_data)

Called once for each supported codec types.

Since :: 3.0

Parameters:

[in]	codec_type	The codec type
[in]	user_data	The user data passed from the foreach function

Returns:: true to continue with the next iteration of the loop, false to break out of the loop.

Precondition:: mediacodec_foreach_supported_codec() will invoke this callback.

See also:: mediacodec_foreach_supported_codec()

Enumeration Type Documentation

enum mediacodec_codec_type_e

Enumerations of media codec type.

Since :: 2.3.1

Enumerator:

MEDIACODEC_NONE	NONE
MEDIACODEC_L16	L16
MEDIACODEC_ALAW	ALAW
MEDIACODEC_ULAW	ULAW
MEDIACODEC_AMR	MEDIACDEC_AMR indicates AMR-NB (Since 3.0)
MEDIACODEC_AMR_NB	AMR-NB (Since 3.0)
MEDIACODEC_AMR_WB	AMR-WB (Since 3.0)
MEDIACODEC_G729	G729
MEDIACODEC_AAC	MEDIACDEC_AAC indicates AAC-LC (Since 3.0)
MEDIACODEC_AAC_LC	AAC-LC (Since 3.0)
MEDIACODEC_AAC_HE	HE-AAC (Since 3.0)
MEDIACODEC_AAC_HE_PS	HE-AAC-PS (Since 3.0)
MEDIACODEC_MP3	MP3
MEDIACODEC_VORBIS	VORBIS (Since 3.0)
MEDIACODEC_FLAC	FLAC (Since 3.0)
MEDIACODEC_WMAV1	WMA version 1 (Since 3.0)
MEDIACODEC_WMAV2	WMA version 2 (Since 3.0)
MEDIACODEC_WMAPRO	WMA Professional (Since 3.0)
MEDIACODEC_WMALSL	WMA Lossless (Since 3.0)
MEDIACODEC_H261	H.261
MEDIACODEC_H263	H.263
MEDIACODEC_H264	H.264
MEDIACODEC_MJPEG	MJPEG
MEDIACODEC_MPEG1	MPEG1
MEDIACODEC_MPEG2	MPEG2
MEDIACODEC_MPEG4	MPEG4
MEDIACODEC_HEVC	HEVC (Since 3.0)
MEDIACODEC_VP8	VP8 (Since 3.0)
MEDIACODEC_VP9	VP9 (Since 3.0)
MEDIACODEC_VC1	VC1 (Since 3.0)

enum mediacodec_error_e

Enumeration of media codec error.

Since :: 2.3.1

Enumerator:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation
MEDIACODEC_ERROR_NOT_SUPPORTED_ON_DEVICE	Not supported
MEDIACODEC_ERROR_PERMISSION_DENIED	Permission denied
MEDIACODEC_ERROR_INVALID_STATE	Invalid state
MEDIACODEC_ERROR_INVALID_INBUFFER	Invalid input buffer
MEDIACODEC_ERROR_INVALID_OUTBUFFER	Invalid output buffer
MEDIACODEC_ERROR_INTERNAL	Internal error
MEDIACODEC_ERROR_NOT_INITIALIZED	Not initialized mediacodec
MEDIACODEC_ERROR_INVALID_STREAM	Invalid stream
MEDIACODEC_ERROR_CODEC_NOT_FOUND	Not supported format
MEDIACODEC_ERROR_DECODE	Error while decoding data
MEDIACODEC_ERROR_NO_FREE_SPACE	Out of storage
MEDIACODEC_ERROR_STREAM_NOT_FOUND	Cannot find stream
MEDIACODEC_ERROR_NOT_SUPPORTED_FORMAT	Not supported format
MEDIACODEC_ERROR_BUFFER_NOT_AVAILABLE	Not available buffer
MEDIACODEC_ERROR_OVERFLOW_INBUFFER	Overflow input buffer (Since 3.0)
MEDIACODEC_ERROR_RESOURCE_OVERLOADED	Exceed the instance limits (Since 3.0)

enum mediacodec_status_e

Enumeration of buffer status.

Since :: 3.0

enum mediacodec_support_type_e

Enumeration of media codec support type.

Since :: 2.3.1

Remarks:: If this codec is to be used as an encoder or decoder, the codec flag must be set to MEDIACODEC_ENCODER or MEDIACODEC_DECODER. If user doesn't set optional flag, default flags will be set to MEDIACODEC_SUPPORT_TYPE_SW.

Enumerator:

MEDIACODEC_ENCODER	This flag is for using the encoder
MEDIACODEC_DECODER	This flag is for using the decoder
MEDIACODEC_SUPPORT_TYPE_HW	This is an optional flag for using the h/w codec
MEDIACODEC_SUPPORT_TYPE_SW	This is an optional flag for using the s/w codec

Function Documentation

int mediacodec_create ( mediacodec_h * mediacodec )

Creates a mediacodec handle for decoding/encoding.

Since :: 2.3.1

Remarks:: you must release mediacodec using mediacodec_destroy().
Although you can create multiple mediacodec handles at the same time, the mediacodec cannot guarantee proper operation because of limited resources, like audio or display device.

Parameters:

[out] mediacodec A new handle to mediacodec

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation

int mediacodec_destroy ( mediacodec_h mediacodec )

Destroys the mediacodec handle and releases all its resources.

Since :: 2.3.1

Remarks:: To completely shutdown the mediacodec operation, call this function with a valid player handle from any mediacodec

Parameters:

[in] mediacodec The handle to mediacodec to be destroyed.

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation

int mediacodec_flush_buffers ( mediacodec_h mediacodec )

Flushes both input and output buffers.

Since :: 3.0

Parameters:

[in] mediacodec The handle to mediacodec

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

int mediacodec_foreach_supported_codec	(	mediacodec_h	mediacodec,
		mediacodec_supported_codec_cb	callback,
		void *	user_data
	)

Retrieves all supported codecs by invoking callback function once for each supported codecs.

Since :: 3.0

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	callback	The callback function to invoke
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: mediacodec_foreach_supported_codec()

int mediacodec_get_output	(	mediacodec_h	mediacodec,
		media_packet_h *	outbuf,
		uint64_t	timeOutUs
	)

Gets the decoded or encoded packet from the output queue.

Since :: 2.3.1

Parameters:

[in]	mediacodec	The handle to mediacodec
[out]	outbuf	The current output of the decoder/encoder. this function passed decoded/encoded frame to output queue.
[in]	timeOutUs	The timeout in microseconds. The input buffer wait up to "timeOutUs" microseconds.

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation

int mediacodec_get_packet_pool	(	mediacodec_h	mediacodec,
		media_packet_pool_h *	pool
	)

Gets the media packet pool allocated for recycling media packets.

The user can get the pool allocated with the number of packets are required to be used in codecs.
It is recomended to use media packet pool for better stability and performance.

Since :: 3.0

Remarks:: The pool should be released using media_packet_pool_deallocate() and destroyed using media_packet_pool_destroy().

Parameters:

[in]	mediacodec	The mediacodec handle
[out]	pool	The allocated pool handle

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	The user calls mediacodec_get_packet_pool() before calling mediacodec_prepare().

Precondition:: mediacodec_get_packet_pool() should be called after calling mediacodec_prepare().

Postcondition:: If the pool is used, media_packet_pool_deallocate() and media_packet_pool_destroy() should be called.

See also:: media_packet_pool_acquire_packet(); media_packet_pool_release_packet(); media_packet_pool_deallocate(); media_packet_pool_destroy()

int mediacodec_get_supported_type	(	mediacodec_h	mediacodec,
		mediacodec_codec_type_e	codec_type,
		bool	encoder,
		int *	support_type
	)

Verifies whether encoding can be performed with codec_type or not.

Since :: 3.0

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	codec_type	The identifier of the codec type of the encoder.
[in]	encoder	Whether the encoder or decoder : (`true` = encoder, `false` = decoder).
[out]	support_type	(`MEDIACODEC_SUPPORT_TYPE_HW` = mediacodec can be performed with hardware codec, `MEDIACODEC_SUPPORT_TYPE_SW` = mediacodec can be performed with software codec)

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE Successful

MEDIACODEC_ERROR_INVALID_PARAMETER

Invalid parameter

 #include <media_codec.h>
 mediacodec_h mediacodec;
 mediacodec_support_type_e type;
 mediacodec_codec_type_e codec_type = MEDIACODEC_H264;

 mediacodec_create(&mediacodec);
 mediacodec_get_supported_type(mediacodec, codec_type, 1, &type);

 if(type == MEDIACODEC_SUPPORT_TYPE_HW)
     // only h/w supported
 else if (type == MEDIACODEC_SUPPORT_TYPE_SW)
     // only s/w supported
 else if (type == (MEDIACODEC_SUPPORT_TYPE_HW|MEDIACODEC_SUPPORT_TYPE_SW)
     // both supported

 mediacodec_set_codec(mediacodec, codec_type, MEDIACODEC_ENCODER | MEDIACODEC_SUPPORT_TYPE_HW);

int mediacodec_prepare ( mediacodec_h mediacodec )

Prepares mediacodec for encoding/decoding.

Since :: 2.3.1

Parameters:

[in] mediacodec The handle to mediacodec

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: The mediacodec should call mediacodec_set_codec()and mediacodec_set_vdec_info()/mediacodec_set_venc_info() before calling mediacodec_prepare() If the decoder is set by mediacodec_set_codec(), mediacodec_set_vdec_info() should be called. If the encoder is set by mediacodec_set_codec(), mediacodec_set_venc_info() should be called.

int mediacodec_process_input	(	mediacodec_h	mediacodec,
		media_packet_h	inbuf,
		uint64_t	timeOutUs
	)

Decodes/Encodes a packet. The function passed undecoded/unencoded packet to the input queue and decode/encode a frame sequentially.

Since :: 2.3.1

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	inbuf	The current input format for the decoder/encoder
[in]	timeOutUs	The timeout in microseconds. The input buffer wait up to "timeOutUs" microseconds.

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation
MEDIACODEC_ERROR_OVERFLOW_INBUFFER	Overflow inputbuffer

int mediacodec_set_adec_info	(	mediacodec_h	mediacodec,
		int	samplerate,
		int	channel,
		int	bit
	)

Sets the default info for the audio decoder.

Since :: 2.3.1

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	samplerate	The samplerate for audio decoding.
[in]	channel	The channels for audio decoding.
[in]	bit	The bits resolution for audio decoding.

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation

int mediacodec_set_aenc_info	(	mediacodec_h	mediacodec,
		int	samplerate,
		int	channel,
		int	bit,
		int	bitrate
	)

Sets the default info for the audio encdoer.

Since :: 2.3.1

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	samplerate	The samplerate for audio encoding.
[in]	channel	The channels for audio encoding.
[in]	bit	The bits resolution for audio encoding.
[in]	bitrate	The bitrate for audio encoding.

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation

int mediacodec_set_buffer_status_cb	(	mediacodec_h	mediacodec,
		mediacodec_buffer_status_cb	callback,
		void *	user_data
	)

Registers a callback function to be invoked when the mediacodec needs more data or has enough data.

Since :: 3.0

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: mediacodec_set_buffer_status_cb should be called before mediacodec_preare().

Postcondition:: mediacodec_buffer_status_cb will be invoked.

See also:: mediacodec_set_buffer_status_cb(); mediacodec_unset_buffer_status_cb()

int mediacodec_set_codec	(	mediacodec_h	mediacodec,
		mediacodec_codec_type_e	codec_type,
		int	flags
	)

Sets the codec type and decoder/encoder.

Since :: 2.3.1

Remarks:: If this codec is to be used as a decoder, pass the MEDIACODEC_DECODER flag. If this codec is to be used as an encoder, pass the MEDIACODEC_ENCODER flag.
The software codec is used as default setting(MEDIACODEC_SUPPORT_TYPE_SW) if user doesn't set hardware flag. If user wants to use h/w decoder, user needs to pass the MEDIACODEC_DECODER | MEDIACODEC_SUPPORT_TYPE_HW.

Parameters:

[in]	mediacodec	The handle of mediacodec
[in]	codec_type	The identifier of the codec type of the decoder/encoder
[in]	flags	The encoding/decoding scheme, defined by mediacodec_support_type_e

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation
MEDIACODEC_ERROR_CODEC_NOT_FOUND	Codec not found

int mediacodec_set_eos_cb	(	mediacodec_h	mediacodec,
		mediacodec_eos_cb	callback,
		void *	user_data
	)

set eos callback the media codec for process, asynchronously.

Since :: 2.3.1

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: mediacodec_set_eos_cb should be called before mediacodec_preare().

Postcondition:: mediacodec_eos_cb will be invoked.

See also:: mediacodec_set_eos_cb(); mediacodec_unset_eos_cb()

int mediacodec_set_error_cb	(	mediacodec_h	mediacodec,
		mediacodec_error_cb	callback,
		void *	user_data
	)

set error callback the media codec for process, asynchronously.

Since :: 2.3.1

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: mediacodec_set_error_cb should be called before mediacodec_preare().

Postcondition:: mediacodec_error_cb will be invoked.

See also:: mediacodec_set_error_cb(); mediacodec_unset_error_cb()

int mediacodec_set_input_buffer_used_cb	(	mediacodec_h	mediacodec,
		mediacodec_input_buffer_used_cb	callback,
		void *	user_data
	)

set empty buffer callback the media codec for process, asynchronously.

Since :: 2.3.1

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: mediacodec_set_input_buffer_used_cb should be called before mediacodec_preare().

Postcondition:: mediacodec_input_buffer_used_cb will be invoked.

See also:: mediacodec_set_input_buffer_used_cb(); mediacodec_unset_input_buffer_used_cb()

int mediacodec_set_output_buffer_available_cb	(	mediacodec_h	mediacodec,
		mediacodec_output_buffer_available_cb	callback,
		void *	user_data
	)

set output buffer available callback the media codec for process, asynchronously.

Since :: 2.3.1

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	callback	The callback function to register
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

Precondition:: mediacodec_set_output_buffer_available_cb should be called before mediacodec_preare().

Postcondition:: mediacodec_output_buffer_available_cb will be invoked.

See also:: mediacodec_set_output_buffer_available_cb(); mediacodec_unset_output_buffer_available_cb()

int mediacodec_set_vdec_info	(	mediacodec_h	mediacodec,
		int	width,
		int	height
	)

Sets the default info for the video decoder.

Since :: 2.3.1

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	width	The width for video decoding.
[in]	height	The height for video decoding.

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation

int mediacodec_set_venc_info	(	mediacodec_h	mediacodec,
		int	width,
		int	height,
		int	fps,
		int	target_bits
	)

Sets the default info for the video encoder.

Since :: 2.3.1

Remarks:: The frame rate is the speed of recording and the speed of playback. If user wants the default setting for ratecontrol, set target_bits to 0.

Parameters:

[in]	mediacodec	The handle to mediacodec
[in]	width	The width for video encoding.
[in]	height	The height for video encoding.
[in]	fps	The frame rate in frames per second.
[in]	target_bits	The target bitrates in bits per second.(a unit of kbit)

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation

int mediacodec_unprepare ( mediacodec_h mediacodec )

Unprepares mediacodec for encoding/decoding.

Since :: 2.3.1

Parameters:

[in] mediacodec The handle to mediacodec

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter
MEDIACODEC_ERROR_OUT_OF_MEMORY	Out of memory
MEDIACODEC_ERROR_INVALID_OPERATION	Invalid operation

int mediacodec_unset_buffer_status_cb ( mediacodec_h mediacodec )

Unregisters the callback function.

Since :: 3.0

Parameters:

[in] mediacodec The handle to mediacodec

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

int mediacodec_unset_eos_cb ( mediacodec_h mediacodec )

unset eos callback the media codec for process, asynchronously.

Since :: 2.3.1

Parameters:

[in] mediacodec The handle to mediacodec

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: mediacodec_set_event_handler_cb()

int mediacodec_unset_error_cb ( mediacodec_h mediacodec )

unset error callback the media codec for process, asynchronously.

Since :: 2.3.1

Parameters:

[in] mediacodec The handle to mediacodec

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: mediacodec_set_error_cb()

int mediacodec_unset_input_buffer_used_cb ( mediacodec_h mediacodec )

unset input buffer used callback the media codec for process, asynchronously.

Since :: 2.3.1

Parameters:

[in] mediacodec The handle to mediacodec

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: mediacodec_set_input_buffer_used_cb()

int mediacodec_unset_output_buffer_available_cb ( mediacodec_h mediacodec )

unset output buffer available callback the media codec for process, asynchronously.

Since :: 2.3.1

Parameters:

[in] mediacodec The handle to mediacodec

Returns:: 0 on success, otherwise a negative error value

Return values:

MEDIACODEC_ERROR_NONE	Successful
MEDIACODEC_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: mediacodec_set_output_buffer_available_cb()

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